Combustion outfit for refrigeration apparatus



P 7, 1935,. L. s. CHADWICK' ET AL 2,014,465

COMBUSTION OUTFIT FOR REFRIGERATION APPARATUS Original Filed June 26, 1929 4 Sheets-Sheet 1 R 2W 1 W M OAMM ,W Maw Sept. 17, was. 2,014,465

COMBUSTION OUTFIT FOR REFRIGERATION APPARATUS s. CHADWICK ET AL Original Filed June 26, 1929- 4 Sheets-Sheet 2 I !I I M I I I I I l I I .5 1 0 F1 n. 0 0M wi /29,? x? n lime-g Sept. 17, 1935.

L. S. CHADWICK ET AL COMBUSTION OUTFIT FOR REFRIGERATION APPARATUS Original Filed June 26, 1929 4 Sheets-Sheet 3 Sept. 17, 1935. L. s. CHADWICK ET AL 2,014,465

COMBUSTION OUTFIT FOR REFRIGERATION APPARATUS Original Filed June 26, 1929 4 Sheets-Sheet 4 Patented Sept. 17, 1935 PATENT OFFICE COMBUSTION OUTFIT FOR REFRIGERATION APPARATUS Lee S. Chadwick, Shaker Heights, and Marc Resek, Cleveland Heights, Ohio, assignors to Perfection Stove Company, Cleveland, Ohio, a

corporation of Ohio Original application June 26, 1929, Serial No. 373,740. Divided and this application June 16,

1931, Serial No. 544,742

5 Claims. (01. 138 -2) This application is a division of one filed by us on June 26, 1929, bearing Serial No. 373,740, the same having issued February 16, 1932 into Patent No. 1,844,932.

The invention, generally, pertains to intermittent absorption refrigerators of the type wherein a combustion device, particularly of the oil burning variety, is used for supplying heat to the generator-absorber, the subject matter of the present case having to do more especially with the mobility of the combustion unit and its removability from the apparatus, as well as with its design and arrangement for avoiding interference with the cooling of the generatorabsorber.

Objects of the invention are to provide a substantial and compact liquid fuel, or oil, burning unit for apparatus of the class referred to; to so mount the unit that it is especially convenient of lighting, filling, and, if desired, removal and insertion; to so construct the apparatus that the oil burning unit is readily accessible, and to so design and arrange said unit that it will not interfere with the cooling of the generatorabsorber.

The above objects, with others hereinafter appearing, are attained in the embodiments of the invention illustrated in the accompanying drawings, wherein Fig. 1 is a sectional front elevation of refrigeration apparatus incorporating our improvements; Fig. 2 is a fragmentary left-hand sectional side elevation of the apparatus on a somewhat larger scale than that of Fig. 1; Fig. 3 is a fragmentary horizontal section through the apparatus on the lines 33 of Figs. 1 and 2; Fig. 4 is a fragmentary sectional side elevation of the oil burning unit, the same being shown in normal position with respect to its support; Fig. 5 is a similar view of said unit showing it in the position that it occupies with respect to its support when withdrawn from the cabinet for lighting and filling purposes; Fig. 6 is a fragmentary plan view of the support for the oil burning unit; Fig. 7 is a detail in sectional side elevation of the forward end of the support with the tray that constitutes a part of the oil burning unit in the act of being removed therefrom; Fig. 8 is a sectional detail on the line 8-8 of Fig. 4; Fig. 9 is a view, similar to Fig. 4, showing a modification of the oil burning unit, and Figs. 10 and 11 are sections on the lines Ill-l0 and l I -l l, respectively, of Fig. 9, the views being taken as though looking in the direction of the arrows associated with the respective lines.

Taking up a detailed description of the invention by the use of reference characters, I designates a base that is shown as constructed of angle iron and as supported a suitable distance above the floor by legs 2 that are applied to the corners of the base. Occupying the greater portion of the area of the base is a cabinet that is designated generally by the reference numeral 3 and that encloses the refrigeration compartment d. This cabinet extends from the front to the rear of the base and from the left-hand side (as viewed from the front) to a point considerably beyond the transverse center thereof. The portionof the base I that is unoccupied by the cabinet 3 is surmounted by a casing designated generally by the reference numeral 5 and consisting of front, side and rear walls 6, l and 8, respectively, the inner edges of the front and rear walls being flanged toward each other, as shown at 6 and 8 respectively, and connected to the adjacent corners of the cabinet 3. The space enclosed 20 by the casing 5 will be referred to as a fiue or combustion chamber, the same being designated l6.

Occupying the flue or combustion chamber I6 is a generator-absorber ii that consists of a cylindrical vessel that is surrounded from end 25 to end by spaced-apart heat abstracting fins l2. Situated within the upper portion of the refrigeration compartment l is an evaporator or cooling unit designated l5, and the same is communicatively connected to the generator-absorber ll through tubes and conduits l6, ll and i8, the conduit I 8 including a coil l8 that is housed within a tank I 9 and forms therewith a condenser that surmounts the cabinet 3. Inasmuch as it constitutes no part of the present invention, it is deemed unnecessary to describe in further detail the refrigerating portion of the apparatus or to explain its mode of operation. This information may be obtained from the parent application above identified.

Brackets 20 rise from the front and rear sides of the base I within the flue l0 and support in wardly facing channel bars 2| which, with said brackets, constitute a support for the oil burning unit designated generally by the reference numeral 22. This unit includes oil burners 23 equipped with commingling tubes 2% and drums or chimneys 25, and said burners are rigidly connected to an oil supply pipe 26 by means of tubular risers 21 through which the wick spaces of the burners communicate with the pipe 26. The forward end of the pipe 26 is connected to a distributing cup 28 into which a bottle-like reservoir 29 is adapted to be inserted. In accordance with common practice, the reservoir 55 may be equipped with a valve that is opened when the reservoir is inverted and placed in the cup, and an accumulation of liquid fuel within the burners and the distributing cup to the approximate level of the mouth of the reservoir causes the latter to be liquid-sealed thereby to prevent further flow from the reservoir excepting as the supply within the system is depleted. A shield 30 is shown as supported by the pipe 26 between the distributing cup and the adjacent burner to protect the contents of the cup and reservoir from the more intense heat of the burner. The pipe 26 is rigidly secured to a shallow tray 3| through brackets 32.

The upper flanges of the channel bars 2| are cut away for a suitable distance back from the forward ends of said bars and are formed at their front ends to provide depending stops 33. Below said stops, the bottom flanges of the channel bars are depressed or recessed, as shown at 34, and the forward extremities of said flanges are elevated slightly, as indicated at 35. The oil burning unit 22 is equipped with a handle 36 formed by the central portion of a substantially U-shaped member that is engaged about and secured to the upper end of the distributing cup 28 and has its rear ends turned outwardly and fastened at 31 to the shield 30.

Fig. 4 shows the oil burning unit 22 in normal position with respect to its support, and by grasping the handle 36, the unit may be slid forwardly to the position illustrated in Fig. when the rear wall of the tray 3| engages the stops 33. At this time, the tray bears upon the elevated forward extremities 35 of the bottom flanges of the channel bars 2|, and the tray, with the parts surrounding it, is held in substantially horizontal position. The oil burning unit is withdrawn to the position shown in Fig. 5 for lighting purposes, and for replenishing the supply ofoll J by the refilling of the reservoir 29 or the substitution of a filled reservoir for an empty one, al-

though for this purpose it is ofcourse not necessary to withdraw the unit as far as shown in Fig. 5. When it is desired to remove the unit entirely from the apparatus, it may be tilted upwardly at its front end so as to permit the rear end of the tray 3| to drop within the depressions 34 of the channel members 2| thereby to allow the rear wall of the tray to escape the stops 33. Such a position of the tray with respect to said stops is illustrated in Fig. 7, and obviously with the parts in this position the unit may be drawn forwardly and lifted clear of the supporting structure.

Access to the oil burning unit is bad through an opening 40 in the front wall 6 of the casing 5, said opening being adapted to be closed by a door 4| whose marginal flange 42 is arranged to seat against a depressed portion 43 of said wall 6 about the opening 40. The door is hingedly connected to the casing at 44 (see Fig. 3). A hood or deflector 45 projects forwardly from the top edge of the opening 40 and is accommodated by the cavity of the door 4| when the door is closed. The purpose of this hood or deflector is to protect the finish of the wall 5 above the opening 40 when the burner unit is being passed through the door while the burners are lighted. Refrigerators of the class herein disclosed are invariably finished in light colored surface coatings or enamels, usually white, and without provision being made for protecting the surface of the casing above the door opening from the products of combustion, it would frequently become smoked and eventually permanently discolored. Hence the hood or deflector 45, above described. The door 4| is equipped with a handle 46 by means of which the door may be opened when it is desired to gain access to the oil burning unit 6 for the purposes of lighting, filling, or cleaning the same. With the door open, the handle 36 may be grasped and the oil burning unit withdrawn from the casing partially or wholly, as hereinbefore explained, depending upon whether the fuel supply has to be replenished, the burners lighted or the parts cleaned. For lighting purposes the unit may be withdrawn to the position shown in Fig. 5, while for cleaning it is preferably disengaged from the support in the manner shown in Fig. 7, and taken away for the purpose. When the burners are lighted, the unit is slid back to normal position and the door closed when the heat from the burners will rise directly in contact with the generator-absorber and pass upwardly about the same, the products escaping through an opening 41 at the top of the flue II] that is covered by a screen or grid 48.

It will be observed from Figs. 1 and 2 that the bottom of the flue or combustion chamber I0, enclosed by the casing 5, is entirely open, and that the combustion unit 22, and its support, are of such a size and are so designed and arranged as not to interfere with the free passage of cool air upwardly about the generator-absorber during the cooling-evaporating period, in a cycle of operation of the apparatus.-

If it should be found desirable to have the oil burning unit capable of being withdrawn from the casing 5 further than is permitted by the construction already described and illustrated in detail in Figs. 4 to 8, the modification shown in Figs. 9 to 11 may be employed. Here an intermediate slide 50 is interposed between the inwardly facing channel bars 5| (supported by brackets 20, like those previously described and designated by the same reference character) and the bumer base or tray 52. The slide 50 comprises L- shaped side members 53 that are connected together at their forward ends by a horizontally disposed cross piece 54 and at their rear ends by a vertically disposed cross piece 55. Intermediate their ends, the base flanges of the side members 53 are connected together by a transverse bar 56 which is depressed, after the slide has been inserted into the channel bars, so as to constitute a stop that is arranged to engage the top cross member of the front bracket 2|! to limit the outward movement of the slide. The burner tray or base 52 is slidably supported upon the base flanges of the side members 53 and, when the parts are in normal position, is held against upward displacement by the top flanges of the channel bars 5|.

The bottom wall of the base or tray 52 has a 60 longitudinal slot 51 for the reception of a pin 53 that rises from the cross member 54 of the slide 50. The material of the base or tray 52 on the opposite sides of the slot 51 is flanged upwardly, as best shown in Fig. 11, and the opening between said upwardly flanged portions at the rear end of the slot is closed by a wall 59. .The front wall of the tray closes the space between said upwardly turned portions at the corresponding end of the slot. Thus the slot is surrounded by a wall that will prevent leakage through said slot of any oil that drips from the parts of the oil burning unit above; and it is to be noted from Fig. 11 that the slot is offset laterally from the vertical plane unit illustrated in Figs. 9 to 11 from the casing,

the handle 36 is grasped and the unit pulled forwardly, the burner base or tray 2 moving in the slide 50 until the rear wall 59 of the slot 51 engages the pin 58, and the slide 50 moving forwardly until its transverse bar 58 engages the cross member of the forward bracket 20. when the parts are in this position, very little of the burner base or tray extends into the channel bars SI and on this account the oil burning unit may be readily lifted from the slide 50.

Having thus described our invention, what we claim is:

1. In apparatus involving an element to be heated, the combination of a support. and an oil burning unit sustained thereby in operative relation to said element, said support comprising opposed inwardly facing channel members, and said oil burning unlt consisting of a tray slidable within said members, a pipe above and rigidly connected to the tray, an oil burner and an oil reservoir secured to and communicating with the pipe and spaced apart longitudinally thereof, and

a shieldv carried by and rising from the pipe between the burner and reservoir.

2. In apparatus involving an element to be heated, the combination of opposed inwardly facing channel members located below said element, a tray slidably supported by and between said channel members, an oil burner and an oil reservoir communicatively connected together and rigidly supported by and above the tray, the top flanges of the channel members, adjacent their forward ends, having depending stops for engagement with parts or the tray to arrest the outward movement of the tray, the bottom flanges of said members being recessed below said stop to provide clearance so as to permit the tray to be tilted and allow its aforesaid parts to pass said stops.

3. In apparatus involving an element to be heated, the combination of opposed inwardly facing channel members located below said element, a tray slidably supported by and between said channel members, an oil burner and an oil reser- -voir communicatively connected together and rigidly supported by and above the tray, the top flanges of the channel members, adjacent their forward ends, having depending stops for engagement with the inner end wall of the tray to arrest the outward movement of the tray, the 5 lower flanges of the channel members being depressed below said stops so as to permit the tray to be tilted and allow its rear wall to pass said stops.

4. In apparatus involving an element to be 10 heated, the combination of opposed inwardly facing channel members located below said element, the top flanges of the channel members being depressed adjacent their forward ends and terminating at such ends in depending stops, the lower 15 flanges being depressed below said stops while their forward extremities are offset upwardly from the plane of their body portions a distance substantially equal to the depressed portions of the upper channels, a shallow tray whose sides 20 are slidable within said channel members, the side walls of the tray havingtheir upper edges cut away to a slight depth from a point near the front to a point near the rear walls of the tray,

' the rear wall of the tray being adapted to engage 25 the aforesaid stops when the tray is moved forwardly and is supported by the upwardly'offset forward ends of the lower flanges ofthe channel members, the tray being adapted to be tilted so that its rear end may drop into the depressions 30 of the lower flanges of the channel members thereby to permit the rear wall of the tray to escape said stops and the tray to be removed from the channels, and oil burning means supported by and above the tray. 35 5. In apparatus involving an element to be heated, the combination of a support, and an oil burning unit sustained thereby in operative relaan upstanding wall surrounding the slot.

LEE S. CHADWICK.

MARC RESEK. 

